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system

  1. D

    There must be a better system design than this

    This is a picture of my sons sink plumbing. The yellow arrow goes to the dishwasher and the red arrow goes to the washing machine. There is a problem with waste water going from the sink, into the washing machine I guess because the pipe, right on the elbow isn't high enough. I have tried to...
  2. A

    GAH Electrastream boiler, low pressure level, how to top up system?

    Can anyone help me identify which tap/connection it is to top up the system as the level has dropped quite a way below the red marker for the cold fill pressure on the gauge? Boiler was installed approx. 2014. I've looked in the manual & online but can't find anything. Many thanks
  3. monkeydust

    Unvented System - Noise Issue

    Anyone know what might be causing this situation please? We have replaced the EV and non-return valve but still happens. Normal static pressure on that gauge is 2.5 but it builds up overnight to 3+ and then the problem occurs. Were a bit lost and had a few engineers look at it. At this...
  4. nick_p

    Vaillant Ecotec system boiler with VR66 and Opentherm (VR33 and Nest)

    Hi everyone, Just wanted to share my experience with "upgrading" an S plan setup to Opentherm and Vaillant Control Center (VR66). There are a few threads on a few different forums but I wanted to share a full write-up with all the steps needed, benefits and costs. Overall, I fully recommend...
  5. W

    Red sludge in Openvented CH system

    I have flushed a CH system removed each Rad and removed any residue of black sludge filled the system up and treated with inhibitor. However after 2 days the water in the Overhead tank is gone red. The Ground floor rads are piping hot and the upstairs are Luke warm bleed the rads still no joy...
  6. Z

    Vaillant System Boiler With Additional Pump

    Hi, i've got a job with a Vaillant Ecotec 630 system boiler, and i don't know the full history but the house has definitely been extended significantly since the boiler was installed. There's now 21 radiators/towel rails. It's getting to temperature, but even after balancing, it's not heating...
  7. paulusgg

    Low loss header in a central heating system

  8. J

    Towel heaters not getting hot in small pipe system

    I have just moved into a late 1990s new-build house with a small bore (about 1/2" OD pipes) gas fired boiler central heating system. All the normal radiators get hot but two of the three towel heater/radiators don't get hot and the pipes feeding them are cool to the touch even after the boiler...
  9. B

    What is the problem with my oil central heating system?

    Context for issue: Last winter the temperature switch on my boiler shorted somehow, the boiler was then running WAY too hot and ended up blowing/melting a hole in one of the pipes. I repaired this by putting in a new stretch of pipe in and just connecting it to the existing pipes with two...
  10. S

    hot water not staying hot in an unvented system

    hello we have an unvented system. we have an issue where the hot water is hot for 10 seconds and then luke warm, turn off taps / wait and turn back and it repeats itself. had boiler checked and told it was the expansion vessel. Had the expansion vessel drained and recharged. plumber told me...
  11. F

    Wood Burner back boiler with gravity rad system.

    Hi All...thx for the help in advance. I have recently installed a wood burner with back boiler heating system. Set up with gravity rad and header tank in loft. I have a recirculation pump installed that I have connected to the rad system that I turn on and off manually. I wanted to know how...
  12. I

    Viessmann 100-W System With Evohome

    Morning, I have a job later this week with the above , Viessmann Vitodens System boiler. It has a 4 pipe setup with internal diverter and at present there is a wireless thermostat/programmer controller in the hallway. Customer wants a Honeywell Evohome System and I just wondered if I can wire...
  13. J

    Heating won’t come on after draining system

    Hi, I drained the the central heating, to remove a radiator. After refilling it, the heating now won’t work. It’s a combi . I’m getting this symbol
  14. B

    Boiler short cycling in system with hot water tank

    Issue with boiler short cycling in system with hot water tank. We have an ideal heating logic heat2 h15 boiler which feeds a hot water tank upstairs in the house. We have an issue where if the boiler isn’t set to 80c then the boiler will short cycle, the hot water tank thermostat is set at...
    • Boiler short cycling
    • Thread
    • boiler hot water system tank water water tank
    • Replies: 10
    • Forum: Boiler Advice Forum
  15. B

    Kitchen and bathroom system legit or not?

    Where and how does the water supply work and is there only one rising main pipe and where is it usually located? I am top floor flat, mains fed supply and all 6 in the block have a shared rising main pipe (I think unless there is meant to be more than one). Kitchen: From the ground floor to...
  16. P

    Isolating hot water supply - indirect unvented cylinder system

    Hello, I am fitting new taps and a shower mixer in my en-suite and was looking to isolate the hot water pipes. I have an unvented indirect heating system (have attached some photos). I was wondering if the isolation valve that would shut off the water to the hot water taps is as circled in the...
  17. E

    How to calculate heating system capacity for expansion tank

    Hello want to know on how do you calculate size of expansion tank for closed heating systems . for example 500 meters of 16mm underfloor heating and 4 double ~1000mm radiators , hot water cylinder coil , and oil boiler
  18. I

    Smart TRV system needed, any advice?

    Afternoon all, I have a customer with a heavily extended semi which now has 4 beds, 2 bathroom and 5 reception rooms. They have started working from home and want to zone the heating system, unfortunately the system boiler and cylinder is in the garage with 2 x 22mm primary pipes disappearing...
  19. J

    System or Heat Only Boiler

    A (if) CH system has a very high head loss due to improperly sized pipework and long runs and possibly partially blocked pipes and requires a UPS2 pump running at its 8M head to feed 21 rads with a theoretical output of 25kw at a 20C dT. A fairly old Vaillant 438 boiler is being replaced, the...
  20. C

    Megaflo system fit not working

    Hi can anybody help me with a problem I am having. following a power cut the heating and hot water failed. The boiler would light but it would go out because of no flow. I thought it was the programmer blown because if it wasn’t calling for heat or hot water it doesn’t trip the electric,but as...

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